Mixing and kneading machine.



R. T. GRIFFITHS. MIXING AND KNEADING MACHINE.

A PPLIOATION FILED MAR. 11, 1908.

912,842, Patented Feb. 16, 1909.

By Mr A TTOHNEYS- 1n: "cums psrsns cc. W'ASNINGYON, arc.

UNITED STATES PATENT oFFioE.

ROBERT 'l. GRIFFITHS, OF PITTSBURG, PENNSYLVANIA.

MIXING AND ICNEADING MACHINE.

To all whom it may concern:

Be itknown that I, ROBERT T. GRIFFITHS, a citizen'of the United States,and a resident of Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented a new and Improved Mixing and KneadingMachine, of which the following is a full, clear, and exact description.

This invention is an improvement in machines for mixing and kneadingdough, and has in view a construction embodying a pail provided withhandles, a cross-bar in which the mixing and kneading device isjournaled, engaging with said handles and held against lateral movementthereby when seated on top of the pail, and means for binding thecross-bar to the top edge of the pail, holding it from displacement in avertical direction; also to provide a crank in connection with themixing and kneading device, having a slidable bolt adapted to beprojected through an opening in the end of said device and detachablyconnecting these parts together, and further, to provide a cover for thepail designed to engage over the handles, and a U-shape clamp slidablyconnected to the under side of the pail for holding it in fixedposition.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views. Figure 1 is a central verticalsection of my improved mixer and kneader as when secured to a fixedsupport by the clamping member; Fig. 2 is a side view of the machine,looking in a direction at right-angles to the showing in Fig. 1, withthe clamp and crank detached; Fig. 3 is a plan of the machine with thecover detached; Fig. 4 is a plan of the cover; Fig. 5 is an invertedplan of the pail with the clamp applied; Fig. 6 is a view of the innerend of the crank detachably connected to the kneading and mixing device;and Fig. 7 is a fragmentary view of the pail, showing the means forretaining the cover and cross-bar in place, on an enlarged scale andpartly in section.

In the construction of my improved apparatus for the mixing and kneadingof dough for bread, cake, etc., I employ a pail 10 of an suitableconstruction, havinghoffset hand es 11 extending above the top edge ofthe pail at the opposite sides. Over these handles is adapted to beengaged a cross-bar 12, the outer ends of which are Specification ofLetters Patent.

Application filed March 11, 1908.

Patented Feb. 16, 1909.

Serial No. 420,425.

slotted for this purpose, as most clearly shown in Fig. 3, and providedwith bifurcated tongues 13 projecting into these slots. Secured to thepail at the inside of the handles are staples 14, passing througheyebolts 15, on which are threaded thumb-nuts 16. The eye-bolts 15 arepreferably slightly up-set or headed at their extremities to prevent theremoval of the nuts, and are adapted to pass within the bifurcations ofthe tongues 13 of the cross-bar 12 when the latter is engaged over thehandles 11 and seated on the top edge of the pail. With the crossbar inthis position it is held against lateral movement by the handles and maynot rise vertically from the pail when the thumb-nuts 16 are tightened,the engagement of the latter with the tongues being preferably insuredby bending the extremities of the tongues slightly upward, as best shownin Fig. 7.

In the center of the cross-bar is journaled a mixing and kneading device17, preferably of the well-known spiral form, and has detachablyconnected to its upper angular end a crank 18, the connection betweenthe crank and mixing device being preferably effected by providing thecrank with a sliding bolt 19 adapted to pass into an opening in the saiddevice when the crank is in position and the bolt projected.

In addition to the cross-bar 12 there is adapted to be placed over thetop of the pail a cover 20, as best shown in plan in Fig. 4, and whichis provided with slotted extended portions or handles 21 adapted toengage over the handles. 11; and further provided with a slot 22 passingfrom one of the handles 0r slotted portions for receiving the stem orspindle of the mixing device. This cover may be used in connection withthe crossbar 12, as illustrated in Fig. 1, and is generally employedwhen the dough is rising.

To the under side of the pail at suitable points are provided feet orprojections 23 and an intermediate block 2 1 of approxi mately the samethickness and having grooves at opposite edgesfor receiving the upperslotted portion of a U-shape screwclamp 25, thus serving to detachablyconnect these parts together, whereby the pail may be seated flat on anysurface when the clamp is not in use.

It will be noted that by the particular mounting of the bolts 15 theymay be swung down between the handles 11 when not in use, and will notinterfere with the use of these handles in lifting the pail in the ordinary manner either when in operative or inoperative position.

Having thus described my invention, T claim as new and desire to secureby Letters Patent:

1. The combination of a pail having handles secured at opposite sides, across-bar adapted to be seated on the top of the pail, having slottedends fitting over the handles and provided with bifurcated tonguesprojecting into the slots, bolts pivotally supported on the sides of thepail at the inside of the handles, having nuts and adapted to be passedinto the bifurcations of the tongues and secure the cross-bar to thepail, and a mixing and kneading device journaled in the cross-bar.

2. The combination of a pail having handles secured at opposite sidesand projecting above its top edge, a cross-bar having slotted oppositeends for receiving the handles, means carried by the pail independent ofthe handles for forcing the crossbar thereto, and a mixing and kneadingdevice journaled in the cross-bar.

3. The combination of a pail having handles secured at opposite sidesand projecting above its top edge, a cover seated on the pail, havinghandles engaged over the handles of the pail, a cross-bar seated on thecover, engaging with the handles of the pail and having bifurcatedtongues, bolts pivotally supported on the pail, having nuts and adaptedto pass Within the bifurcations of the tongues in securing the cross-barto the pail, and a kneading and mixing device passing through the coverand journaled in the cross-bar.

4. The combination of a pail, a cross-bar adapted to be seated on thepail, having bifurcated tongues provided with uiwardlyturnedextremities, bolts pivota ly supported at opposite sides of the pail,adapted to pass in the bifurcations of the tongues, nuts threaded on thebolts for engaging the tongues at the inside of their upwardlyturnedextremities, and a kneading and mixing device ournaled in the cross-bar.

5, The combination of a pail having mixing means and provided with feeton its under side, a block secured to the under side of the pail betweensaid feet and approximately of the same thickness as the feet, and aU-shaped clamp slidable on said block for securing the pail in fixedposition.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

ROBERT T. GRIFFITHS.

VVitnesses EVELYN GRIFFITHS, OATHARINE GRIFFITHS.

